Received as gift and never used since our babies slept in the Snoo, which has special swaddles. Have only heard rave reviews about the Ollie though! Moisture Wicking Patented moisture-wicking threads are interwoven into the fabric to help reduce the risk of overheating The Perfect Fit Custom closure allows fit to be individualized to meet the need and size of each little one – even as they grow Easy Diaper Changes Opening at the bottom allows for easy access diaper changes – no need to un-swaddle Grows with You The Ollie® grows with your little one through transitional stages - no need to buy multiple sizes